<template>
    <div> 数字：{{num}}</div>
<button @click="add">+1</button>
<button @click="dec">-1</button>
</template>
<script>
export default{
    data() {
        return{
            num:1,
        };
    },
    methods:{
        add(){
            this.num++;
        },
        dec(){
            this.num--;
        }
    },
};

</script>